searching for Ole Helgeson

My Great, great grandfather Ole Helgeson born 1820 in Hadeland, Norway. Father was a Helge Bakken. Ole emigrated to America abt 1854. I have fairly extensive family history from 1854 forward. Looking for birth, family information. Apparently there is conflicting birth information also indicating a Hakedal location? Any information appreciated. Tom Aspenson Wisconsin, USA